Key Systems & Key Control Flashcards
7 cards from real CPL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Key Systems & Key Control flashcards as text
What is a 'floating master' in a master key system?
Answer: A master key combination not used in any individual lock bitting
A floating master is a master key combination intentionally kept unused in change key bittings to preserve security and reduce cross-keying.
Which high-security lock standard is commonly referenced in the US for key control and pick resistance?
Answer: UL 437
UL 437 is the Underwriters Laboratories standard for key locks, covering pick resistance, drill resistance, and key control requirements.
In a master key system, what is the 'change key' (also called the 'servant key')?
Answer: The lowest-level key that operates only one specific lock
A change key (servant key) is the individual key cut to operate a single specific lock and no others in the system.
A hotel that uses a card-based electronic key system wants to add mechanical key backup. Which concern is most important for the locksmith to address?
Answer: Ensuring mechanical keys are also restricted to prevent unauthorized duplication
Mechanical backup keys must be restricted keyways to prevent unauthorized duplication that would bypass the electronic access control.
What does the term 'key section' refer to?
Answer: The cross-sectional profile of the key blade that matches the keyway
The key section is the cross-sectional shape of the key blade, designed to fit only matching keyway profiles in the cylinder.
When a building manager requests a 'key audit,' what does a locksmith typically do?
Answer: Verify all issued keys are accounted for by comparing issuance records to returned keys
A key audit reconciles key issuance records against physical keys on hand to identify unaccounted or missing keys.
In a master key system designed with 'levels,' what does a 'great grand master key' (GGMK) indicate?
Answer: The top-level key in a four-level hierarchy above the grand master
A great grand master key sits at the top of a four-level key hierarchy, operating all locks below the grand master level and above.